Telephone switch



March 24. 1925. 1,530,999 7 C. L. GOODRUM TELEPHONE SWITCH Filed May],1923 2 Sheets-Sheet 1 I /7V6/7f0/i' 074M615 L 6001/0/22 M 4 0] March 24.'1925.

1,530,999 I C. L. GOODRUM 1 TELEPHONE SWITCH Ix Filed May], 1923 2Sheets-Sheet 2 4 7 2d Patented Mar. 24, 1925.

UNITED STATES PATENT. OFFICE.

CHARLES I. GOODRUM, 013 YORK, N. .Y., ASSIGNOR T0 \VESTERN ELECTRICCOM.-

PA'NY, INCORPORATED, OF NEW, YGBK, NJ Y A CORPORATION OF NEW YOBK.

mennrnonn swrToH.

Application. filed May 2, was. Serial No. 637,106.

To all whom it may concern: Be it known that I, CHARLns L. GooDnUM,

a citizen of the United ,States,residingat New York, in the county ofNew York, State of New York, have invented certain new and usefulImprovements in Telephone.

Switches, of which the following is a full, clear, concise, and exactdescription.

This invention relates to switches of the type adapted for establishingconnections in an automatic or semiautomatic telephone system. Moreparticularly it refers to improvements in switches of the generalcharacter such as that'shown in the application of J. N; Reynolds,Serial No. 486,367, filed July 21, 1921, and in the British patent toWestern Electric Company, Limited, No. 183,438, accepted September 6,1923. i

Heretofore, .it has been customary in switches of this type to providean insulating support whereby the sets of contacts were mountedcollectively. This method necessitates the disturbance of all sets ofcontacts associated with the insulating member whenever one or more setsare to be repaired or replaced.

The object of this invention, therefore, is

to mount each setzof contacts individually and to effect the removal orreplacement of each set as the occasion may arise without disturbing anyother sets of contacts mounted on the switch.

A feature in'this invention resides in the provision of unitary sets ofactive and passive contacts and a portion of the contact,

' tion and the claims appended thereto, ref

erence being had to the accompanying drawings, in which Fig. 1 is apartial top as sembly view of said switch, Fig. 2is a left side viewthereof,F1g. 3 is a back view of telephone 1 on upright supports andextend at right angles therefrom, in operable relation with an operat ngmechanlsm adapted for selectively moving the-active contacts of each setinto contacting engagement with their associated sets ofpassivecontacts. 1

Each set of active contacts generally comprises a number of bare wires21, 22, 23, which are associated'with a similar number of passivecontact wires 24, 25, 26. Each set of active and passive contacts arearranged between'a number of superposed insulating str-ips27, 28, 29and-30 which are held securely in position by means of achannel-shaped'trame .31. .On two opposite sides of frame .31 andintegrally formed therewith, extend the arms 32 and 33 on which isfixedly arranged a card 34 having in its upper portion a plurality'ofV-shaped recesses 15,- 16 and 17 in which the passive contacts 24, 25and 26 are positioned. In the downward portion of the card 34 there isprovided a number of slots 12, 13 and. 14 in which the active contacts21, 22 and 23 are located in contacting relation with the flattened endportions of their associated passive contacts 24, 25 and 26,respectively.

The contacts of each unitary set comprising the wires 21, 22, 23 and24,25, 26,- protrude through an apertured card 35 which is slidablyarranged between the fixed card 34 and the inwardly bent portions 36 and37 of arms 32 and 33, respectively.

On two opposite sides of frame 31 and integrally formed therewith, thereextends at right angles thereto, the stops 38 and 39 which are providedfor readily locating and securing the frames 31 in position on theirsupporting members.

The unitary sets of contacts are generally arranged in rows on uprightsupports shown in Fig. 3 which are disposed parallel to each other andsecurely held on a cross bar 40 attached to the switch frame (notshown). On two oppositev sides of supports 20 there are provided anumber of similarly disposed recesses 19 in which the unitary set ofcontacts are positioned. On eachsupport 20 there is slidably arranged alatching member 41 each having a number of pro;- jections .42 adapted toengage the stops 38 i and 39 of each frame 31 in one row and lock hookedon the bar 43 and is held in posi-s tion on arm 44 by means of a screw46 and a stop 47. i 1 I For each bar 43 there is provided a pair ofelectromagnets 48 and 49 each associated with an armature 50 and 51',respectively, which are arranged on the bar at different angulardistances with reference to the operating magnets. Armature 51 ispivotally arranged on the bar43 and is adapted to move it one step inresponse to the energization of its respective electromagnet 49.Armature 50 is rigidly fastened on the bar 43 and is adapted to move thebar another step in response to the energization of its respectiveelectromagnet 48-.

Fig. 4 shows an arm 44 and the'resilient member 45 carried thereby innormal nonoperated'position. The first step of bar 43 imparted by theenergization of magnet 49 moves the resilient member 45 to positionshown at 53 in operable relation with its associated arm 56. bar 43imparted by the energization of magnet 48 moves the resilient members inposition shown at 54.

For each vertical row of active contacts there is provided a verticalbar 55 each provided with a plurality of arms 56 .and an arm 57 which isin operable relation with an armature 58 adapted to rotate the bar inresponse to each energization of its respective magnet 59. Each arm 56is as sociated with a card 35 and a resilient member 45, but it is to benoted that normally member 45 is free to move along theside of the card35 without engaging it. When the horizontal bar 43 is rotated one step Asecond step of the lifting members 45 are moved in operative relationwith their associated arms 56 wherein a movement of a bar 55 moves itsrespective member 45 in en-gageable relation with the card as shown at60 in Fig. 4 and the second step of bar 43 is eiiec tive to move theselected card for effecting the interengagement between aset of activeand passive contacts.

After the connection has been established, the ma net 59 may be releasedto permit the ver ical bar 55 to restore to it's normal osition. Theconnection is maintaine by the continued energization of the magnet 48,which holds the arm 44 in its rotated position against the resilientmember 45.

What is claimed is: I I

1. In a switching device, a set of active and passive contacts arrangedbetween strips of insulating material, a frame for holding said contactsin adjusted position, a pluralitfy of notched supports. for said frame,

and means "carried by each of said supports for holding said frame inposition thereon.

2. In a switching device, a set of active contacts, a set of passivecontacts, said contacts arranged between superposed insulating strips, aframe for securing Said strips, notched supports for locating saidframe, and lockingimeans on each of said supports for holding saidframein adjusted position thereon.

3. In a switching device, a set of passive contacts, a set of activecontacts arranged in spaced relation on insulating strips, a channelshaped frame for securing said contacts'between said strips, a pair ofnotched supports for said frame, a latching member arranged. on each ofsaid supports for locking said frame in adjusted position thereon.- v

'4. In a switching device, a plurality'of superposed unitary sets ofactive and passive contacts, notched supports therefor, a latchingmember slidably-arranged on each of said supports for locking saidcontact sets thereon collectively.

5-. In a switching device, unitary sets of active and passive'contactsarranged in rows, a plurality of supporting members therefor, each ofsaid members being common to two rows of said sets, means arranged onsaid supports for locking said contact sets in one of said rowscollectively.

6. In a switching device, sets of active and passive contacts arrangedin rows, supporting members therefor each common to a plurality of setsin each of said rows, and means arranged on each of said membersforlocking and releasing said sets in a number of said rows. a

7. In a switching device, a unitary set of active and passive contactsarranged on mao ses a a frame, supporting members extending each of saidmembers cooperating with said from two opposite sides of said frame forstops for holding said contacts in position supporting the free endportion of each of thereon. 10 said contacts, a pair of stops integrallyIn witness whereof, I, hereunto subscribe 5 formed with said frame andextending at my name this 4th day of May A. D., 1923.

right angles relative to the direction of said supporting members, andmeans on CHARLES L. GOODRUM.

